Zobrazeno 1 - 10
of 159
pro vyhledávání: '"G. Srimannarayana"'
Publikováno v:
ARKIVOC, Vol 2006, Iss 16, Pp 35-42 (2006)
Externí odkaz:
https://doaj.org/article/9eb5302fb2904bca923c6f13c221f96f
Autor:
G Srimannarayana et. al.
Publikováno v:
Turkish Journal of Computer and Mathematics Education (TURCOMAT). 12:5230-5238
The health insurance sector has grown at a double digit growth rate in India in the past decade. The Government schemes for the individuals' insurance coverage from the low-income group have resulted in higher penetration. Raise in the disposable inc
Autor:
D.A. Padmavathi, S. Veeresham, G. L. D. Krupadanam, A.K.D. Bhavani, T. U. Kumari, G. Srimannarayana
Publikováno v:
hc. 18:269-274
Photochemical oxidation of substituted coumarins 1, 3 and 5 in benzene solution containing iodine gave the respective products 2, 4 and 6. The structures of the photoproducts have been confirmed by analyses of analytical and spectral data. The experi
Publikováno v:
Synthetic Communications. 37:795-804
Condensation of 8‐formyl‐7‐methoxy‐2‐phenyl‐4H‐1‐benzopyran‐4‐ones (5a–f) with ethyl‐3‐aminocrotonate (6) in glacial acetic acid under Hantzsch conditions afforded 7‐methoxy‐2‐aryl‐3‐phenyl/or‐H‐8‐[2‐(4,6
Publikováno v:
ARKIVOC, Vol 2006, Iss 16, Pp 35-42 (2006)
Condensation of ω-substituted-2,4-dihydroxyacetophenones (1a-c) with 3-(2-aryl)-5-methyl-4isoxazolecarbonyl chlorides (2a-c) in acetone-K2CO3 medium afforded 2-[3-aryl-5-methyl-4isoxazolyl]-7-hydroxy-3-phenyl-4H-1-benzopyran-4-ones (3a-f) in good yi
Publikováno v:
Synthetic Communications. 31:1547-1557
2-Hydroxy-3-allylacetophenones on Claisen condensation with EtOAc/Na gave intermediate diketone, followed by cyclization in AcOH/HCl gave 8-allyl/-1-propenylchromones, which on ozonolysis gave 8-acetaldehydes or 8-carboxaldehydes. The above aldehydes
Publikováno v:
Synthetic Communications. 28:3827-3833
2-methylchromones (1a-d) and chromone-2-carboxaldehydes (3a-d) on reaction with aq. NaOCl yield selectively 3-chlorochromones (2a-d and 4a-d) in yield 61–93%.
Publikováno v:
Synthetic Communications. 28:2421-2428
3:4-Fused furocoumarins and pyrrolocoumarins are synthesised from 3-hydroxy and 3-benzamido-substituted coumarins by a novel two step sequence.
Publikováno v:
ChemInform. 22
Publikováno v:
ChemInform. 22